8103440 has 20 divisors (see below), whose sum is σ = 18840684. Its totient is φ = 3241344.

The previous prime is 8103439. The next prime is 8103451. The reversal of 8103440 is 443018.

It can be written as a sum of positive squares in 2 ways, for example, as 6210064 + 1893376 = 2492^2 + 1376^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50567 + ... + 50726.

Almost surely, 2^8103440 is an apocalyptic number.

8103440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8103440 is an abundant number, since it is smaller than the sum of its proper divisors (10737244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8103440 is a wasteful number, since it uses less digits than its factorization.

8103440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101306 (or 101300 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 8103440 is about 2846.6541763973. The cubic root of 8103440 is about 200.8583112398.

Adding to 8103440 its reverse (443018), we get a palindrome (8546458).

The spelling of 8103440 in words is "eight million, one hundred three thousand, four hundred forty".